D-Link DES-3250TG ユーザーズマニュアル

if you prefer, manually enter a value in the Rate field, and then click Apply. Please note that if no_limit is Enabled, the Switch 
will not permit you to set the bandwidth rate manually. 

The DES-3250TG supports Simple Network Time Protocol (SNTP), an adaptation of the Network Time Protocol (NTP). As 
specified in RFC-1305 [MIL92], NTP is used to synchronize computer clocks in the global Internet. It provides comprehensive 
mechanisms to access national time and frequency dissemination services, organize the time-synchronization subnet, and adjust 
the local clock in each participating subnet peer.  

The access paradigm is identical to the UDP/TIME Protocol and, in fact, it is usually easy to adapt a UDP/TIME client 
implementation to operate using SNTP. Moreover, SNTP is also designed to operate in a dedicated server configuration 
including an integrated radio clock. With careful design and control of the various latencies in the system, it is possible to 
deliver time accurate to the order of microseconds. 

To enable SNTP on the Switch, click SNTP Settings in the Configuration folder and then click Current Time Settings: 

 

To use SNTP, toggle the SNTP State in the Current Time: SNTP Settings section to Enabled and enter the IP address of the 
relay the SNTP Primary Server and/or the SNTP Secondary Server. Enter an SNTP polling interval in the bottom field. The 
default setting of 720 seconds is usually fine for most network configurations; a greater polling frequency will draw more 
network resources. Click Apply to let your changes take effect.